Hidden resonance risks! Abnormal vibration in wind turbines—monitoring data provides early warnings of potential hazards.

Is your equipment suddenly vibrating and making persistent unusual noises? Many fan‑related failures stem from seemingly minor belt resonance—resulting in production fluctuations at best, or component breakage and shutdowns at worst. Today, we’ll walk you through a real‑world case study to show how smart monitoring can detect hidden faults early and mitigate equipment risks at a low cost!

In early May 2026, following the restart of a ventilation fan in a food-processing plant’s workshop, abnormal vibrations occurred frequently. The intelligent operations‑and‑maintenance platform flagged an alert as real-time data turned red: the horizontal vibration velocity at the motor drive end surged to 19.17 mm/s, far exceeding the equipment’s safe operating threshold and remaining persistently high for several days.

The system continuously triggers automatic pop-up alerts and, leveraging mechanistic algorithms, accurately determines that the equipment is present. Potential Risks of Mechanical Structural Resonance , It synchronously pushes out‑of‑tolerance parameters and equipment ledger data, enabling early containment of potential faults within the monitoring scope and preventing minor issues from escalating into shutdown incidents. Attached are the platform’s alarm details, with alarm timestamps, alarm types, and threshold‑exceeding values clearly presented at a glance.

Data speaks for itself: a single spectrum reveals the true nature of resonance.

Equipment malfunctions cannot be concealed—the vibration spectrum will reveal them. After reviewing the waveform and frequency spectrum, technicians determined that the fan’s vibration was far from random; a specific frequency was consistently amplifying the vibration amplitude, much like repeatedly pushing a swing at its natural resonant point, causing the vibrations to grow increasingly severe—clear evidence of belt resonance.

Based on a comprehensive analysis of the equipment’s operating conditions, the technical team determined that the fault was most likely caused by insufficient belt tension and ash buildup on the impeller, and promptly issued a recommendation to the enterprise to shut down the unit for maintenance.

On-site unboxing and root-cause analysis! It turns out the culprit behind the vibration is a loose drive belt.

In accordance with the maintenance plan, the equipment was shut down for inspection. Upon removing the protective cover, the maintenance team identified the root cause: the drive belt had excessive slack, causing it to bounce and vibrate significantly during operation—precisely the culprit behind the machine’s resonant vibration.

Throughout the entire process, there is no need to replace costly components such as fans or bearings; maintenance is performed simply by adjusting the belt tension and tightening fasteners, resulting in a streamlined and highly efficient service procedure.

Rectification measures have been effectively implemented, and the measured data have delivered a perfect score.

Following completion of the maintenance, the equipment was restarted, and the intelligent monitoring platform provided real-time feedback on the corrective measures: the motor vibration velocity dropped from a peak of 19.17 mm/s to the safe range of 5–6 mm/s, with both the vibration waveform and the frequency spectrum returning to stable conditions. In just one day, the persistent resonance hazard was completely eliminated.

Case Study Insights | One Incident Reveals the True Strength of Intelligent Operations and Maintenance

From wind turbine fault early warning to closed-loop fault resolution, this efficient handling of belt resonance vividly demonstrates the distinct advantages of intelligent equipment maintenance:

1. Real-time trend capture: Early, continuous vibration‑anomaly warning enables proactive mitigation of major failures such as belt tears and bearing damage.

2. Precise Fault Root Cause Analysis: By leveraging spectrum data to pinpoint the root cause of resonance, it eliminates the high costs associated with indiscriminate disassembly and unnecessary part replacements.

3. Rapid Fault Resolution: The end-to-end workflow—early warning, diagnostics, maintenance, and verification—is swiftly implemented, ensuring the stable operation of the workshop’s fermentation production environment.

Zhongyun Technology specializes in the food, pharmaceutical, and other manufacturing sectors, leveraging digital online monitoring to ensure the health and reliability of industrial equipment throughout its entire lifecycle.